Nonswellable hydrogels with robust micro/nano-structures and durable superoleophobic surfaces under seawater

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（1）
• 页码范围: 64-70
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s11426-017-9149-x

摘要

Hydrogels,composed mainly of water trapped in three dimensional cross-linked polymer networks,have been widely utilized to construct underwater superoleophobic surfaces.However,the swelling nature and instability of hydrogels under complex marine environment will weaken their underwater superoleophobicity.Herein,we synthesize structured poly (2-hydroxyethylmethacrylate) (PHEMA) hydrogels by using sandpaper as templates.The robust non-swelling of PHEMA hydrogel ensures that micro/nano-structures on the surface of PHEMA hydrogels can be well maintained.Moreover,when roughness Ra of about 3～4 tm,the surface has superior oil-repellency.Additionally,even after immersing in seawater for one-month,their breaking strength and toughness can be well kept.The non-swellable hydrogels with long-term stable under seawater superoleophobicity will promote the development of robust superoleophobic materials in marine antifouling coatings,biomedical devices and oil/water separation.